If your looking to make your own intake pipe, you’ll need one of these. CNC machined from 6061 billet aluminum, the bottom side is contoured to fit snug on the tubing for a perfect fit and easy weld. Holes are tapped for a 10-32 thread and new hardware is included. To top is all off each flange is engraved with an arrow and the marking “AIR” so there is no mistake as to which way it needs to be installed.